John:
<snip>
> Given that addresses from these per-node pools are dynamically allocated to subscribers, is it possible for the cable company to reprovision
> the address space from the ISP's other underutilized nodes as needed? (This is what is expected from all other ISPs in similar situations under the present policy.)
Good question. Unfortunately the answer is no. In most cases the allocations on the other underutilized nodes is already a /29, so reprovisioning those other nodes to a /30 isn't practical. To my knowledge the cable companies require all nodes to be numbered.
Bill